This example will provide a basic explanation of how to give priority to a specific outlet when using a balanced release allocation.
In this example, there is one reservoir and a single stream.
There are three outlets labeled a, b, and c.
There is a minimum release of 250 cfs for outlet a.
There is a maximum release of 250 cfs for outlet a. Having the maximum and minimum as the same value causes this exact release from outlet a (assuming that outlet a has the physical capacity to do so).
Also, note that the Rel. Alloc. is grayed out. This means that I have not specified a release allocation so it will default to balanced. This means that once the requirements in the rule set are satisfied, the remaining release will be balanced among the outlets.
Looking at the pool elevation results, we see that the pool starts in conservation and rises to the top of conservation. The pool is rising because I have a constant inflow of 500 cfs coming into the model and a minimum required release of 400 cfs. This 100 cfs difference is causing the rise in pool elevation.
Also, note that 400 cfs is being released while the pool is in conservation. Once the pool reaches top of conservation, ResSim wants to hold that level so all 500 cfs of inflow is passed.
The final plot shows the releases at all three outlets. The green line shows the release at outlet a. This release is a constant 250 cfs since both the minimum and maximum at that outlet were set to 250 cfs.
The remaining required release is balanced between outlets b and c. While in conservation, the minimum release of 400 cfs is required. ResSim divides the remaining release (150 cfs) equally between the two giving 75 cfs at each. Once the pool reaches top of conservation, outlet a continues with the 250 cfs, and ResSim divides the remaining release (250 cfs) equally between outlets b and c giving 125 cfs at each.
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